<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>CONVERSATION</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script src="/js/jquery-1.7.2.min.js"></script>
</head>
<body>
<div >
	WelcomeWebsoket3<br/>
	<input id="text" type="text" /><button onclick="send()">Send</button>
	<button onclick="closeWebSocket()">Close</button>
	<div id="message"></div>
	<input type="hidden" th:value="${id}" id="sid"></input>
	<script type="text/javascript">
		var sid=null;
		sid=document.getElementById('sid').value;
	    var websocket = null;
	    //判断当前浏览器是否支持WebSocket
	    if('WebSocket' in window){
	        websocket = new WebSocket("ws://localhost:8080/websocket/"+sid);
	    }
	    else{
	        alert('Not support websocket')
	    }
	
	    //连接发生错误的回调方法
	    websocket.onerror = function(){
	        setMessageInnerHTML("error");
	    };
	
	    //连接成功建立的回调方法
	    websocket.onopen = function(event){
	        setMessageInnerHTML("open");
	    }
	
	    //接收到消息的回调方法
	    websocket.onmessage = function(event){
	        setMessageInnerHTML(event.data);
	    }
	
	    //连接关闭的回调方法
	    websocket.onclose = function(){
	        setMessageInnerHTML("close");
	    }
	
	    //监听窗口关闭事件，当窗口关闭时，主动去关闭websocket连接，防止连接还没断开就关闭窗口，server端会抛异常。
	    window.onbeforeunload = function(){
	        websocket.close();
	    }
	
	    //将消息显示在网页上
	    function setMessageInnerHTML(innerHTML){
	        document.getElementById('message').innerHTML += innerHTML + '<br/>';
	    }
	
	    //关闭连接
	    function closeWebSocket(){
	        websocket.close();
	    }
	
	    //发送消息
	    function send(){
	        var message = '1:'+document.getElementById('text').value;
	        websocket.send(message);
	    }
	</script>
</div>
</body>
</html>